Half step



FIG. 1 is a perspective view of a half step showing my new design;

FIG. 2 is a front elevation view thereof, the rear elevation view being a mirror image of FIG. 2;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken lines shown in the figures are for the purpose of illustrating portions of the half step which form no part of the claimed design. 

CLAIM The ornamental design for a half step, as shown and described. 